Grate



2 SheetsSheet 1.

(No Model.)

H. M. WEAVER.

GRATE.

No. 371,112. Patented Oct. 4, 1887.

llVVE/VTOR 'Aforey UNITED" STATES PATENT OFFICE.

HENRY M. \VEAVER, OF MANSFIELD, OHIO.

GRATE.

SPECIEICATION forming part of Letters Patent No. 371,112, dated October 4, 1867. Application filed September 1, 1886. Serial No. 212,380. (No model.)

To all whom it may concern:

Be it known that I, HENRY M. VVEAVER, of Mansfield, in the county of Richland, State of Ohio, have invented certain new and useful Improvementsin Grates; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apperthe front grate-bars.

It has been found that the manner of securing the ends of the dumpingbars was not proof against a possible displacement of the bars when a clinker became wedged between them, and no provision was made for cutting off all ingress of air to the space below the grate-bars-a very necessary feature when it is desired to keep a low fire.

The object of my presentinvention is to provide a grate in which the bars shall have such a movement as to readily clear the ashes and effectually grind the clinkers without any liability of becoming displaced, and to provide a damper in connectionwith the apron or crown by which the draft may be cut off from beneath the grate.

A further object is to provide a grate-bar which shall becapable of a longitudinallysliding movement, and also of a rocking or dumping movement.

With these ends in view my invention consists in certain features of construction and modified construction of end bearing for the sliding grate-bars. Fig. 6 is a view in perspeotive of a slightly-modified construction of apron. Fig. 7 is a view in side elevation of one end of the grate-frame, and Fig. 8 is a view in transverse section of the apron.

A rep resents the grateframaprovided with four legs, a. A pair of upright standards, 13, connected above the plane of the grate'bars by the upper and lower rails of a series of upright bars, are bolted to the front legs or front rail of the frame A. The horizontal frame and legs a are preferably cast in one piece and the standards B, connected by the front series of bars, in another; but the standards and front bars might be cast integral with the grateframe, if found desirable. The ends of the frame A are provided wit-h slots 0 and c, for the reception of the ends of the grate-bars. The slots are formed in the upper portions of the depending flanges 0 of the ends, sothat the ends of the grate-bars, when the bars are slid lengthwise, will slide beneath the horizontal flanges o of the ends, and become thereby locked against displacement. The horizontal flanges may either be left solid along the upper edges of the slots or they may be provided with narrowed openings 0, extending back from the edges of the slots, not broad enough to allow the grate-bar to become displaced, but afifording ventilation from beneath the grate up the ends of the fire-box. The horizontal flange 0 might also be provided with a narrow strip of metal, 0 across the extended opening, the said strip of metal forming the stop for preventing the displacement of the end of the grate-bar. Such con' strnction is shown in the modification, Fig. 5.

The grate consists of a series of independent barsin the present instance threethe two outside bars, D, being adapt-ed to be recipro cated longitudinally, while the middle bar, (I, is adapted to have both a longitudinal and rocking motion. The slots 0, in which the ends of the central bar slide, are preferably circular in form, as shown in Figs. 2 and 7, and the slots 0, in which the ends of the bars Dslide,

are preferably of oblong shape, as shown, to prevent the bars from a laterallytilting movement. Each of the bars D and d is provided ICO with spurs or branches extending laterally from both edges, the spurs or branches on the at the front of the grate.

on the rear side than on the front side to enable the bar to be dumped with greater ease.

The operating-bar E, for reciprocating the grate-bar, is j ournaled in suitable bearings, 0, cast in the front and rear rails of the frame A near one end of the frame, and is bent downwardly into crank shape at e, where it passes beneath the middle or dumping bar, d. The said operating-bar E is provided with a pair of upwardly-extending loops or lugs, e", the upper ends of which are adapted to engage open slots (1 in the lower edges of the gratebars D. The middle or dumping bar, (I, is pro vided with a pair of depending branches or with a fork-ended lug, d", adapted to embrace the opposite sides of the cranked portion eof the operating-bar. Thus, when the operatingbar E is rocked back and forth by a suitable handle or shaker, F, inserted in a socket, f, in the end of the bar E, or adapted to embrace a squared end of the bar, as may be found desirable, the outside bars, D, will be propelled in one direction while the middle bar is propelled in the opposite direction, and the speed of the spurs on the adjacent bars, passing each other in opposite directions, will be double what it would if one of the bars were stationary, the speed of the shaker being constant. This causes an increased agitation of the ash and cinder, grinding the latter to powder and clearing the ashes out in a short time. The ends of the grate-bars, when at any point in their stroke excepting the extremes, are both held securely against any possible displacement, and there is no liability of their being thrown out of place at that instant.

It will be observed that the connection between the dumping-bar d and the operatingbar E is such as to admit of the bar (1 being freely rocked in its bearings. This rocking or dumping motion is given the bar, when desired, by pulling outwardly on the hooked end of the rod G, the opposite end of which is attached to the lower end of a depending lug, H, on the under side of the bar (I. The rod G projects through the front rail of the frame A, and is provided with a notch, g, on its under side,which,when the bar (1 is in its normal position, engages the front rail, as shown in Fig. 4, and locks the bar (Z in position. The bar d is thus rendered capable of both a longitudinally reciprocating and laterally rocking movement without the introduction of an anxiliary frame.

The apron or crown I consists of a thin plate of metal provided, as in the former case,with an outwardly-flaring upper lip, i, the plate being of a suitable size and shape to fit between the standards B and close the space below and The particular devices for holding the apron I in position are not essential, as several well-known devices might be advantageously employed; but I find it convenient to construct the lower edge of the apron bulging outwardly, as shown at K, or with feet, as shown at K, Fig. 6. In the former construction there was a narrow opening between the inside face of the apron and the front of the grate, through which the ashes which rattled out through the front grate passed down to the ash-pan or hearth. In the present instance the narrow opening 7c is partially closed by a series of proj ections, Z, formed on the rear side of the-apron and extending into contact with the front of the grate-frame. The apron is provided with a series of draft openings, m. A damper, M, seated on the back of the apron and operated by a knob, N, on the front,is adapted to be slid and open and close the openings m, and also the spaces between the projections Z on the back of the apron. Thus,whenthedamperisclosed,theingress of air beneath the grate will be completely out off, while the ashes which fall through the front grate and lodge on the ledge 1 will be allowed to drop through the spaces between the projections Z when the draft is open.

It is evident that the central bar might be made to reciprocate and rock while the remaining bars were stationary or motionless, and that the bars might be all of them arranged, like the central bar, to reciprocate and rock, and the apron might be held in position by brackets at its lower edge simply, or it might be hooked to the standards, and other slight changes might be resorted to without departing from the spirit and scope of my in vention; hence I do not wish to limit myself strictly to the construction herein set forth; but,

Having fully described my invention,what I claim as new, and desire to secure by Letters Patent, is-

1. The combination,with a grate-frame provided with bearings for the grate-bars, of a longitudinally-sliding gratebar supported in the bearings, the latter overlapping the ends of the gratebar when the grate-bar is in a position between the limits of its longitudinal movement and exposing an end of the bar when the latter is at the extremities of its throw, substantially as set forth.

2. A grate-frame and grate-bars, the grateframe being provided With grate-bar bearings overlapping one end of each bar and locking them at said end against accidental displacement when the said bars are at the extremities of their longitudinal movement, substantially as set forth. I

3. A grate-frame provided with ventilatingslots, the latter being located at points in line with and beyond the ends of the grate-bars, substantially as set forth.

4:. The combination,with a grate-frame provided with bearings, of a series of sliding bars supported in said bearings, the latter overlapping the ends of the bars when said bars are in a position between the limits of their longitudinal movement, and a cranked rock-bar adapted to reciprocate the grate-bars simultaneously in opposite directions, substantially as set forth. 7

5. The combination, with the outside gratebars, of the middle grate-bar and the rock provided with an outwardly-flaring lip at its upper edge and with a series of projections along the inner face at the base of its flaring lip, substantially as set forth.

8. The combinatiomwith an apron provided with aseries of draftopenings and with a flaring upper edge for catching ashes, of a damper attached to the apron and adapted to close the draft-openings and the openings between the apron and the grate-frame, substantially as set forth.

9. Thecombination,withagrate-franieandthe apron provided with a series of projections on its back adapted to partially close the opening between the apron and grate-frame, of a damper attached to the apron and adapted to close the spaces between said projections, substantially as set forth.

In testimony whereoflhavesigned this specification in the presence of two subscribing witnesses.

HENRY M. WEAVER. \Vitnesses:

J. P. HENRY, W. H. FUNK. 

